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dod03-52 Member
Joined: Nov 14, 2008 Posts: 91 Location: Minnesota
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Posted: Mon May 25, 2009 7:52 am Post subject: Ign Harness rebuild |
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After searching on the "Internets" for weeks, I found 5mm diameter ign wire to rebuild the shielded harness instead of buying one for $160.00!!
$20.00 for 20 feet Enough to do 3 harnesses. We used to rebuild these for aircraft engines all the time. If all goes well I will let you know where to get the wire. |
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oilleaker1 Member
Joined: May 14, 2009 Posts: 971 Location: South Dakota
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Posted: Mon May 25, 2009 8:05 am Post subject: |
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I think this must be a common problem since my plug wires have the outer rubber falling off. I was wondering if the inner is still good or if you could re-cover them. Your idea sounds interesting. Special tools to re-crimp the ends? Are you thinking of doing others for people? John |
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dod03-52 Member
Joined: Nov 14, 2008 Posts: 91 Location: Minnesota
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Posted: Mon May 25, 2009 8:27 am Post subject: |
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The end connectors are called "cigarettes" on aircraft engines and they just "screw" into the ends of the wires---no tools needed, The outside rubber is another problem==they are put on before the ends are soldered to the braided hoses---any one got ideas about the outside rubber replacement? |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16256 Location: Wisconsin
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Posted: Mon May 25, 2009 9:16 am Post subject: |
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This topic comes up often. The outer chaff protection is a molded rubber sleeve and actually only prevents the stranded steel sleeve of the harness from rubbing grooves into things it lays against. It is not an indicator of the internal rubber part's condition. This is best determined by inspection. Or at least by measuring electrical isolation using an ohm meter between the core wire and the stranded steel sleeve. A confirmed open circuit while wiggling the lead will indicate it is good to go for shorts. A quick check for excessive resistance or an open circuit between the two wire tips will assure the lead wire is in good shape.
The large industrial fuse size wire shrink works well to replace the deteriorated outer rubber sleeve.
The reference to aviation shielded harness construction is true in that the basic design is similar but most modern aviaition harness are flexible shield covering the inner wire directly and not as a conduit. The modern aviation harness uses 18mm plug attachments.
This is what the modern aircraft harnes termination looks like:
Magneto distributor block attachment
Spark plug end
_________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php |
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MODIFIED Member
Joined: Mar 28, 2008 Posts: 353 Location: BrOoKlYn
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Posted: Wed May 27, 2009 5:43 pm Post subject: |
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wow, you have the potential of making alot of new friends should your rebuild work. BTW, I am experimenting with liquid EPDM rubber for possible repair welding on the outer rubber jackets of the stock wires.
please let us know your conclusions .... thank you. |
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